| Cover | Nov. 01, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | This Amendment No. 1 on Form 8-K/A is being filed by Digi to amend the current report on Form 8-K filed with the Securities and Exchange Commission (“SEC”) on November 2, 2021 (the “Original Report”), solely to provide the disclosures required by Item 9.01 of Form 8-K that were not previously filed with the Original Report, including the required financial statements of Ventus, the required pro forma financial information, and incorporating, by reference, the Form 8-K filed on December 23, 2021, which discloses the third amended and restated credit agreement (“the Credit Agreement”) with BMO Harris Bank N.A (“BMO”). Except as otherwise provided herein, the disclosures made in the Original Report remain unchanged. |
| Document Period End Date | Nov. 1, 2021 |
| Entity File Number | 1-34033 |
| Entity Registrant Name | Digi International Inc. |
| Entity Central Index Key | 0000854775 |
| Entity Tax Identification Number | 41-1532464 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 9350 Excelsior Blvd. |
| Entity Address, Address Line Two | Suite 700 |
| Entity Address, City or Town | Hopkins |
| Entity Address, State or Province | MN |
| Entity Address, Postal Zip Code | 55343 |
| City Area Code | 952 |
| Local Phone Number | 912-3444 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.01 per share |
| Trading Symbol | DGII |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
